Resistance device.



No. 834,424. PATENTBD 00130, 1000.

I W. L. WATERS.

R'ESISTANCBDEVIGE.

APPLICATION FILED APR. 28, 1905 3 SHEETS-SHBETI.

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3.834,424. PATENTEDOGT.30,I906. W.LWATERS. RESISTANGBDBVIGE.

APPLICATION FILED APR. 2s, 190s.

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W. L. WATERS RESISTANCE DEVICE.

APPLIGATION FILED APR. 28,1905.

3 SHEETS-SHEET- 3.

Inv Enmr' l William LJ/Vaer s -H A IDF@ ri'NrTn V*refras@ PATENT OFFICE.

IWILLIAM L. VIATERS, OF MLWAUKEE, WISCONSIN, ASSIGNOR TO NATIONAL BRAKE & lilLEbTRlC COMPANY, OF MILWAUKEE, WIS-l CONSIN, A CORPORATIION OF WISCONSIN.

RESISTANCE DEVICE.

Specification. of Letters Patent.

patented oet. so, 190e.

lilpplication filed April 28,119.05. Serial No. -257,8-37.

To all whom it may concern/.- a i Be it known that I, WILLIAM L. WATERaa citizen ofthe UnitedStates, residing at Milwaukee, in the county of` Milwaukee and State of Wisconsin., have invented a certain new and useful Improvement in Resistance Devices, of which the following is a full, clear, concise, and exact description, reference being ,had'to' the accompanying drawings, forming a 'part of this specification.

g chines are started from the direct-current side. In doing this the machine must be runv to speed and then synchronized, and when synchronizing the speedmust be adjusted! very accurately. Where a machinevof thisI kin'd is run from a'traction-circuit, the voltage is very irregular and varies rapidly,and it is a very diiiicult matter to obtain the eXaetf speed, it usually requiring quite a length 'of time. The ,sudden variation .in voltage makes it impossible to obtain the correct .speed by means of a shunt-rhecstat, for instance, as the operation of a device of this kind is not rapid enough. Also, owing to the .time it takes to acquire the correct speed,

the coils of the shunt-rheostat would have to be incircuit, for a length of time and would iinally break down.

My inventiontherefore contemplates a resistance device specially designed for this -class of work and which will carry a heavyf."

current for a length of time sufficientl for botaining the propersynchronizing speed. 4O-

' My device consists of wire spirals or coils carried between porcelain insulators, which are again carried onan iron framework, the coil being immersed ina tank of oil.I

My invention will be best understood when described withmeference to the accompany- Figure 1 isla plan view of the device with the cover removed. Fig'. -2 isV an elevation view, part thereof being in section and lEig. 3

is a longitudinal sectional view taken on line 3 3, of l"ig.`1.. f Y

YA tank 1 is provided ,with a cover 2, se-

cured thereto by means of angle-irons 3, vthe directengagement with the tank-walls.

cover being provided with hand-holes 4, having lids 5. The frame for supporting the resistance-coils may be lifted bodily from the ltank and consists of similar side supporting members formed of vertical supporting-rods 6, secured together by transverse rods 7. The upper part 8 of each vertical supportingrod is bent back on itself a distance, as shown, and a similar bent piece 9 is secured to each verticalrod near its lower end, -the ,bend at thereto serving to maintain the rods out of tween the corresponding verticalsupportingrods of the side members and near the top and bottom of the tank are rods or shafts 10, `the ends of these rods projecting through openings in the vertical supports andl secured in place by means of pins 11, passing through openings 12 through said ends. On each of \t e rods 10'are placed spools 13, of glass, porcelain, or other insulating material, and these spools are spaced appropriately' by means of sleeves 14, also of glass, porcelain,

*the spools on correspondingupperand lower bars being preferably'the same. Between each spool onv an upper shaft and the spool -directly below on the lower shaft are placed theresistance-coils 15. The application of each coil being engaged by a wire hanger 16, whichvmay be ordinary wire coiled several times about the spool to form a loop through which the coil end may pass. In this manner the coils are entirely insulated, and the supporting-frame, therefore, is in no way sevlifted bodily therefrom,` and can be taken apartor assembled at the outside, which allows repairs or other changes to be made with rapidity and safety. y

Ends of the coils may be suitably electrically-connected together 'by means of connectors 1 7', while other ends'thereof may connect with main terminal posts or lugs 18, these lugs being provided with openings 19 at -their lower end, into which the coil ends may pass, and clamping-shrews 20 for clamping the erds in position are rovided. The upper end of each post or ug is drilled to receive a mainconductor or cable 2l. These lugs preferably pass upwardly through the these coils is best shown in Fig. 2, the end of the top of the rod and the bent piece'secured or other insulating materiahthe spacing of Y vcured to the tank or other parts, but can be r cover, and in order to be insulated therefrom bushings 22, of insulating material, are provided, and the upper part of the lugs may also be engaged. by the threaded. washer or nut 23 to be held in place, These terminal posts or lugs are connected, by means of the main conductors or cables, with switching mechanism and with the machine to be controlled in a manner well known in the art.

In order to more thoroughly insulate the coils and other parts from each other and also to keep the coils cool, the tank is filled vwith oil or other insulating fluid. A construction of this kind is practically ireproof' and has a-very large capacity for heat and can be kept, in circuit until the oil 'reachesa very high temperature without damage resulting 1n anywvay, and I find that the temperature of the oil may reach 1.00O centi- .grade without harmful results. Hooks or liangersQ'l maybe secureflto the sides of the tank from which it maybe suspended. My invention, t";e'rel"ore, is of great importance wiere a resistance carrying heavy current must be maintained in circuit for any length of time.

I do not wish to be limited to the exact' sulators carriedby said rods, spacing members on said rods between said insulators, resistance-coils extending between said upper and lower bars and secured to said insulators, and main terminals extending from said tank and suitably connected with resistancecoils.

2. In a device of the class described, the combination with a tank containing insulating-oil, of a supporting-trame adapted to be bodily inserted in and removed from said tank, horizontal rods at the upper and lower end of said supporting-trame, spools of insulating material on said rods, insulating spacing-sleeves inserted in -said rods between said spools, vertical resistance-coils held between said spools and suitably connected together, and main terminal -lugs extending through the cover of said tank and suitably connected with resistance-coils.

3. In a device of the class described, the combination with a tank containing insulate ing-oil, ol a supporting-frame adapted to be bodily slid into and out' of said tank, vertical side members for said frame, horizontal rbds extending between said side members at the top and bottom of the tank, supports of insulating material onsaid rods, vertical resistance-coils supported between said insulated supporting members and suitably connected together, and main terminals extending through the cover of the tank and suitably connected with resistance-coils.

4. In a device of the class described, the combination with. a tank containing insulating-oil, of a supporting-frame ada ted to be bodily slid from and into said tan vertical side members tor-said supporting-trame, horif zontal supporting-rods connected with said side members at the top and bottom of the tank, spools ofinsulating material surrounding said'rods, spacing-bushings of insulating .material between said spools, resistance members engaging and extending between corresponding spools, and main terminal lugsl extending from said tank for connection with an external circuit and having connection with suitable resistance members.

5. In a device of the class described, the combination with a tank containing insulating-oil, of a su porting-frame within said tank, vertical si e rods for said frame, transverse rods connecting said vertical rods t0- gether, horizontal rods at the top and bottom of the tan-k extending between opposite vertical rods, spools of'insulating material on said rods, spacers of insulating material on said rods separating said spools, resistance members engaging and suspended between opposite supporting members, vand means for lconnecting appropriate resistance members with an external circuit.

6. In a device of the class described, the combination with a tank filled with insulating-oil, of a supporting-frame therein, vertical side rods for said frame, transverse rods connected together, vertical rods at each side of the tank, horizontal rods at the top and bottom of the tank connected between opposite vertical side rods, Vspools of insulating material on said rods, spacin -bushings of insulating material on said -ro s between said spools, resistance members suspended between opposite spools on the upper and lower rods, and terminal lugs for connecting appropriate resistance members with an external circuit.-

7. In a'device of the class described, the combination with a tank filled with insulating-oil, of a supporting-frame adapted to be slid into and from said tank, side members for said frame composed of vertical rods connected together by transverse rods, horizontal rods at .the top andbottom of said tank extending between o posite side rods,'spoo1s of insulating materia on said horizontal rods, spacing-bushings of insulating material on said rods between said spools, resistance members suspended between the opposite spools on opposite up er and lower horizontal rods, a cover for sai tank, and terminal lugs ex- IOO IIO

tending through said cover for engagements?3oH with an exterior circuitand having connection with suitable resistance members.

8. In a device" ofI the class described, the combination with resistance members, of a Asuplporting-frame therefor, side members for sai supporting-frame composed of vertical rods connected together by transverse rods, upper and lower horizontal supportingshafts extending through the corresponding vertical rods of the side members of the frame, -spools of insulating material on said horizontal shafts betweenf which said resistance members are sup orted, and bushings of insulating materia on said horizontal shafts for s acing said spools.

9. In a device of the class described, the combination with resistance members, of a supporting-frame therefor, vertical side members for said supporting-frame, horizontal supporting-shaftsv extending at their ends through openings in said side members and securedin place b means of pins, spools of insulating materia on said horizontal shafts between w 'lich the resistance members are suspended, and bushings of insulating material on said shafts for s acing said spools.

10. In a device of tllie class described, the combination with resistance members in the form of wire spirals, of a supporting-frame therefor, side members for said supportingframe composed of vertical rods connected together by transverse rods, horizontal. supporting-rods at the lupper and lower ends of said supporting-frame engaging corresponding vertical rods of the side members, spools of insulating material on said rods, said resistance members being suspended between opposite spools on the upper and lower horizontal supporting-rods, bushings of insulating material on said horizontal rods for s acing said spools, and main terminal ugs adapted for connection with an external circuit and with suitable resistance members.

11. In a device of theclass described the combination with resistance members, of a su porting-frame therefor, said frame having sidi)l members, connected t9 ether by horizontal supporting-rods, insu ating supporting members on said rods between which said resistance members are suspended, and spacing members between said supporting members.

12. Inl a device of the class described the combination with' resistance members, of a su porting-frame therefor, said frame having si e members connected together by horizon- -tal supporting-rods, spools of insulating ma- 7 my name this 24th day of April, A. D. 1905.

WILLIAM L. WATERS.

Witnesses:

JOHN. E. HUBEL, J. DIXON, Jr, 

